/*
 * Copyright (c) 2015, Paul Gaunard (www.codeability.net)
 * All rights reserved.

 * Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:
 * - Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.
 * - Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the 
 *  documentation and/or other materials provided with the distribution.

 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 
 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR 
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF 
 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

using System;

using Microsoft.SPOT;
using Microsoft.SPOT.Hardware;

using SecretLabs.NETMF.Hardware;
using SecretLabs.NETMF.Hardware.Netduino;

namespace CodeAbility.MonitorAndCommand.Netduino.Tools
{
    public class SimpleVoltageSensor
    {
        private const int MAXIMUM_VALUE_INT = 1024;
        private const float REFERENCE_VOLTAGE_FLOAT = 3.30f;
        private const float VOLTS_PER_COUNT_FLOAT = REFERENCE_VOLTAGE_FLOAT / MAXIMUM_VALUE_INT;

        SecretLabs.NETMF.Hardware.AnalogInput analogInput;

        public SimpleVoltageSensor(Cpu.Pin pin)
        {
            analogInput = new SecretLabs.NETMF.Hardware.AnalogInput(pin);
        }

        public float ReadVoltage()
        {
            int intValue = analogInput.Read();

            float voltageValue = ((float)intValue) * VOLTS_PER_COUNT_FLOAT;

            return voltageValue;
        }
    }
}
